<?php
/*=======================================================================
 // File:        JPGRAPH_RADAR.PHP
 // Description: Radar plot extension for JpGraph
 // Created:     2001-02-04
 // Ver:         $Id: jpgraph_radar.php 1783 2009-08-25 11:41:01Z ljp $
 //
 // Copyright (c) Aditus Consulting. All rights reserved.
 //========================================================================
 */

require_once('jpgraph_plotmark.inc.php');

//===================================================
// CLASS RadarLogTicks
// Description: Logarithmic ticks
//===================================================
class RadarLogTicks extends Ticks {

	function __construct() {
		// Empty
	}

	function Stroke($aImg,&$grid,$aPos,$aAxisAngle,$aScale,&$aMajPos,&$aMajLabel) {
		$start = $aScale->GetMinVal();
		$limit = $aScale->GetMaxVal();
		$nextMajor = 10*$start;
		$step = $nextMajor / 10.0;
		$count=1;

		$ticklen_maj=5;
		$dx_maj=round(sin($aAxisAngle)*$ticklen_maj);
		$dy_maj=round(cos($aAxisAngle)*$ticklen_maj);
		$ticklen_min=3;
		$dx_min=round(sin($aAxisAngle)*$ticklen_min);
		$dy_min=round(cos($aAxisAngle)*$ticklen_min);

		$aMajPos=array();
		$aMajLabel=array();

		if( $this->supress_first ) {
			$aMajLabel[] = '';
		}
		else {
			$aMajLabel[]=$start;
		}

		$yr=$aScale->RelTranslate($start);
		$xt=round($yr*cos($aAxisAngle))+$aScale->scale_abs[0];
		$yt=$aPos-round($yr*sin($aAxisAngle));
		$aMajPos[]=$xt+2*$dx_maj;
		$aMajPos[]=$yt-$aImg->GetFontheight()/2;
		$grid[]=$xt;
		$grid[]=$yt;

		$aImg->SetLineWeight($this->weight);

		for($y=$start; $y<=$limit; $y+=$step,++$count  ) {
			$yr=$aScale->RelTranslate($y);
			$xt=round($yr*cos($aAxisAngle))+$aScale->scale_abs[0];
			$yt=$aPos-round($yr*sin($aAxisAngle));
			if( $count % 10 == 0 ) {
				$grid[]=$xt;
				$grid[]=$yt;
				$aMajPos[]=$xt+2*$dx_maj;
				$aMajPos[]=$yt-$aImg->GetFontheight()/2;
				if( !$this->supress_tickmarks ) {
					if( $this->majcolor != '' ) {
						$aImg->PushColor($this->majcolor);
					}
					$aImg->Line($xt+$dx_maj,$yt+$dy_maj,$xt-$dx_maj,$yt-$dy_maj);
					if( $this->majcolor != '' ) {
						$aImg->PopColor();
					}
				}
				if( $this->label_formfunc != '' ) {
					$f=$this->label_formfunc;
					$l = call_user_func($f,$nextMajor);
				}
				else {
					$l = $nextMajor;
				}

				$aMajLabel[]=$l;
				$nextMajor *= 10;
				$step *= 10;
				$count=1;
			}
			else {
				if( !$this->supress_minor_tickmarks ) {
					if( $this->mincolor != '' ) {
						$aImg->PushColor($this->mincolor);
					}
					$aImg->Line($xt+$dx_min,$yt+$dy_min,$xt-$dx_min,$yt-$dy_min);
					if( $this->mincolor != '' ) {
						$aImg->PopColor();
					}
				}
			}
		}
	}
}

//===================================================
// CLASS RadarLinear
// Description: Linear ticks
//===================================================
class RadarLinearTicks extends Ticks {

	private $minor_step=1, $major_step=2;
	private $xlabel_offset=0,$xtick_offset=0;

	function __construct() {
		// Empty
	}

	// Return major step size in world coordinates
	function GetMajor() {
		return $this->major_step;
	}

	// Return minor step size in world coordinates
	function GetMinor() {
		return $this->minor_step;
	}

	// Set Minor and Major ticks (in world coordinates)
	function Set($aMajStep,$aMinStep=false) {
		if( $aMinStep==false ) {
			$aMinStep=$aMajStep;
		}

		if( $aMajStep <= 0 || $aMinStep <= 0 ) {
			JpGraphError::RaiseL(25064);
			//JpGraphError::Raise(" Minor or major step size is 0. Check that you haven't got an accidental SetTextTicks(0) in your code. If this is not the case you might have stumbled upon a bug in JpGraph. Please report this and if possible include the data that caused the problem.");
		}

		$this->major_step=$aMajStep;
		$this->minor_step=$aMinStep;
		$this->is_set = true;
	}

	function Stroke($aImg,&$grid,$aPos,$aAxisAngle,$aScale,&$aMajPos,&$aMajLabel) {
		// Prepare to draw linear ticks
		$maj_step_abs = abs($aScale->scale_factor*$this->major_step);
		$min_step_abs = abs($aScale->scale_factor*$this->minor_step);
		$nbrmaj = round($aScale->world_abs_size/$maj_step_abs);
		$nbrmin = round($aScale->world_abs_size/$min_step_abs);
		$skip = round($nbrmin/$nbrmaj); // Don't draw minor on top of major

		// Draw major ticks
		$ticklen2=$this->major_abs_size;
		$dx=round(sin($aAxisAngle)*$ticklen2);
		$dy=round(cos($aAxisAngle)*$ticklen2);
		$label=$aScale->scale[0]+$this->major_step;

		$aImg->SetLineWeight($this->weight);

		$aMajPos = array();
		$aMajLabel = array();

		for($i=1; $i<=$nbrmaj; ++$i) {
			$xt=round($i*$maj_step_abs*cos($aAxisAngle))+$aScale->scale_abs[0];
			$yt=$aPos-round($i*$maj_step_abs*sin($aAxisAngle));

			if( $this->label_formfunc != '' ) {
				$f=$this->label_formfunc;
				$l = call_user_func($f,$label);
			}
			else {
				$l = $label;
			}

			$aMajLabel[]=$l;
			$label += $this->major_step;
			$grid[]=$xt;
			$grid[]=$yt;
			$aMajPos[($i-1)*2]=$xt+2*$dx;
			$aMajPos[($i-1)*2+1]=$yt-$aImg->GetFontheight()/2;
			if( !$this->supress_tickmarks ) {
				if( $this->majcolor != '' ) {
					$aImg->PushColor($this->majcolor);
				}
				$aImg->Line($xt+$dx,$yt+$dy,$xt-$dx,$yt-$dy);
				if( $this->majcolor != '' ) {
					$aImg->PopColor();
				}
			}
		}

		// Draw minor ticks
		$ticklen2=$this->minor_abs_size;
		$dx=round(sin($aAxisAngle)*$ticklen2);
		$dy=round(cos($aAxisAngle)*$ticklen2);
		if( !$this->supress_tickmarks && !$this->supress_minor_tickmarks) {
			if( $this->mincolor != '' ) {
				$aImg->PushColor($this->mincolor);
			}
			for($i=1; $i<=$nbrmin; ++$i) {
				if( ($i % $skip) == 0 ) {
					continue;
				}
				$xt=round($i*$min_step_abs*cos($aAxisAngle))+$aScale->scale_abs[0];
				$yt=$aPos-round($i*$min_step_abs*sin($aAxisAngle));
				$aImg->Line($xt+$dx,$yt+$dy,$xt-$dx,$yt-$dy);
			}
			if( $this->mincolor != '' ) {
				$aImg->PopColor();
			}
		}
	}
}


//===================================================
// CLASS RadarAxis
// Description: Implements axis for the radar graph
//===================================================
class RadarAxis extends AxisPrototype {
	public $title=null;
	private $title_color='navy';
	private $len=0;

	function __construct($img,$aScale,$color=array(0,0,0)) {
		parent::__construct($img,$aScale,$color);
		$this->len = $img->plotheight;
		$this->title = new Text();
		$this->title->SetFont(FF_FONT1,FS_BOLD);
		$this->color = array(0,0,0);
	}

	// Stroke the axis
	// $pos    = Vertical position of axis
	// $aAxisAngle = Axis angle
	// $grid   = Returns an array with positions used to draw the grid
	// $lf   = Label flag, TRUE if the axis should have labels
	function Stroke($pos,$aAxisAngle,&$grid,$title,$lf) {
		$this->img->SetColor($this->color);

		// Determine end points for the axis
		$x=round($this->scale->world_abs_size*cos($aAxisAngle)+$this->scale->scale_abs[0]);
		$y=round($pos-$this->scale->world_abs_size*sin($aAxisAngle));

		// Draw axis
		$this->img->SetColor($this->color);
		$this->img->SetLineWeight($this->weight);
		if( !$this->hide ) {
			$this->img->Line($this->scale->scale_abs[0],$pos,$x,$y);
		}

		$this->scale->ticks->Stroke($this->img,$grid,$pos,$aAxisAngle,$this->scale,$majpos,$majlabel);
		$ncolor=0;
		if( isset($this->ticks_label_colors) ) {
			$ncolor=count($this->ticks_label_colors);
		}

		// Draw labels
		if( $lf && !$this->hide ) {
			$this->img->SetFont($this->font_family,$this->font_style,$this->font_size);
			$this->img->SetTextAlign('left','top');
			$this->img->SetColor($this->label_color);

			// majpos contains (x,y) coordinates for labels
			if( ! $this->hide_labels ) {
				$n = floor(count($majpos)/2);
				for($i=0; $i < $n; ++$i) {
					// Set specific label color if specified
					if( $ncolor > 0 ) {
						$this->img->SetColor($this->ticks_label_colors[$i % $ncolor]);
					}

					if( $this->ticks_label != null && isset($this->ticks_label[$i]) ) {
						$this->img->StrokeText($majpos[$i*2],$majpos[$i*2+1],$this->ticks_label[$i]);
					}
					else {
						$this->img->StrokeText($majpos[$i*2],$majpos[$i*2+1],$majlabel[$i]);
					}
				}
			}
		}
		$this->_StrokeAxisTitle($pos,$aAxisAngle,$title);
	}

	function _StrokeAxisTitle($pos,$aAxisAngle,$title) {
		$this->title->Set($title);
		$marg=6+$this->title->margin;
		$xt=round(($this->scale->world_abs_size+$marg)*cos($aAxisAngle)+$this->scale->scale_abs[0]);
		$yt=round($pos-($this->scale->world_abs_size+$marg)*sin($aAxisAngle));

		// Position the axis title.
		// dx, dy is the offset from the top left corner of the bounding box that sorrounds the text
		// that intersects with the extension of the corresponding axis. The code looks a little
		// bit messy but this is really the only way of having a reasonable position of the
		// axis titles.
		if( $this->title->iWordwrap > 0 ) {
			$title = wordwrap($title,$this->title->iWordwrap,"\n");
		}

		$h=$this->img->GetTextHeight($title)*1.2;
		$w=$this->img->GetTextWidth($title)*1.2;

		while( $aAxisAngle > 2*M_PI )
		$aAxisAngle -= 2*M_PI;

		// Around 3 a'clock
		if( $aAxisAngle>=7*M_PI/4 || $aAxisAngle <= M_PI/4 ) $dx=-0.15; // Small trimming to make the dist to the axis more even

		// Around 12 a'clock
		if( $aAxisAngle>=M_PI/4 && $aAxisAngle <= 3*M_PI/4 ) $dx=($aAxisAngle-M_PI/4)*2/M_PI;

		// Around 9 a'clock
		if( $aAxisAngle>=3*M_PI/4 && $aAxisAngle <= 5*M_PI/4 ) $dx=1;

		// Around 6 a'clock
		if( $aAxisAngle>=5*M_PI/4 && $aAxisAngle <= 7*M_PI/4 ) $dx=(1-($aAxisAngle-M_PI*5/4)*2/M_PI);

		if( $aAxisAngle>=7*M_PI/4 ) $dy=(($aAxisAngle-M_PI)-3*M_PI/4)*2/M_PI;
		if( $aAxisAngle<=M_PI/12 ) $dy=(0.5-$aAxisAngle*2/M_PI);
		if( $aAxisAngle<=M_PI/4 && $aAxisAngle > M_PI/12) $dy=(1-$aAxisAngle*2/M_PI);
		if( $aAxisAngle>=M_PI/4 && $aAxisAngle <= 3*M_PI/4 ) $dy=1;
		if( $aAxisAngle>=3*M_PI/4 && $aAxisAngle <= 5*M_PI/4 ) $dy=(1-($aAxisAngle-3*M_PI/4)*2/M_PI);
		if( $aAxisAngle>=5*M_PI/4 && $aAxisAngle <= 7*M_PI/4 ) $dy=0;

		if( !$this->hide ) {
			$this->title->Stroke($this->img,$xt-$dx*$w,$yt-$dy*$h,$title);
		}
	}

} // Class


//===================================================
// CLASS RadarGrid
// Description: Draws grid for the radar graph
//===================================================
class RadarGrid { //extends Grid {
	private $type='solid';
	private $grid_color='#DDDDDD';
	private $show=false, $weight=1;

	function __construct() {
		// Empty
	}

	function SetColor($aMajColor) {
		$this->grid_color = $aMajColor;
	}

	function SetWeight($aWeight) {
		$this->weight=$aWeight;
	}

	// Specify if grid should be dashed, dotted or solid
	function SetLineStyle($aType) {
		$this->type = $aType;
	}

	// Decide if both major and minor grid should be displayed
	function Show($aShowMajor=true) {
		$this->show=$aShowMajor;
	}

	function Stroke($img,$grid) {
		if( !$this->show ) {
			return;
		}

		$nbrticks = count($grid[0])/2;
		$nbrpnts = count($grid);
		$img->SetColor($this->grid_color);
		$img->SetLineWeight($this->weight);

		for($i=0; $i<$nbrticks; ++$i) {
			for($j=0; $j<$nbrpnts; ++$j) {
				$pnts[$j*2]=$grid[$j][$i*2];
				$pnts[$j*2+1]=$grid[$j][$i*2+1];
			}
			for($k=0; $k<$nbrpnts; ++$k ){
				$l=($k+1)%$nbrpnts;
				if( $this->type == 'solid' )
				$img->Line($pnts[$k*2],$pnts[$k*2+1],$pnts[$l*2],$pnts[$l*2+1]);
				elseif( $this->type == 'dotted' )
				$img->DashedLine($pnts[$k*2],$pnts[$k*2+1],$pnts[$l*2],$pnts[$l*2+1],1,6);
				elseif( $this->type == 'dashed' )
				$img->DashedLine($pnts[$k*2],$pnts[$k*2+1],$pnts[$l*2],$pnts[$l*2+1],2,4);
				elseif( $this->type == 'longdashed' )
				$img->DashedLine($pnts[$k*2],$pnts[$k*2+1],$pnts[$l*2],$pnts[$l*2+1],8,6);
			}
			$pnts=array();
		}
	}
} // Class


//===================================================
// CLASS RadarPlot
// Description: Plot a radarplot
//===================================================
class RadarPlot {
	public $mark=null;
	public $legend='';
	public $legendcsimtarget='';
	public $legendcsimalt='';
	public $csimtargets=array(); // Array of targets for CSIM
	public $csimareas="";   // Resultant CSIM area tags
	public $csimalts=null;   // ALT:s for corresponding target
	private $data=array();
	private $fill=false, $fill_color=array(200,170,180);
	private $color=array(0,0,0);
	private $weight=1;
	private $linestyle='solid';

	//---------------
	// CONSTRUCTOR
	function __construct($data) {
		$this->data = $data;
		$this->mark = new PlotMark();
	}

	function Min() {
		return Min($this->data);
	}

	function Max() {
		return Max($this->data);
	}

	function SetLegend($legend) {
		$this->legend=$legend;
	}

	function SetLineStyle($aStyle) {
		$this->linestyle=$aStyle;
	}

	function SetLineWeight($w) {
		$this->weight=$w;
	}

	function SetFillColor($aColor) {
		$this->fill_color = $aColor;
		$this->fill = true;
	}

	function SetFill($f=true) {
		$this->fill = $f;
	}

	function SetColor($aColor,$aFillColor=false) {
		$this->color = $aColor;
		if( $aFillColor ) {
			$this->SetFillColor($aFillColor);
			$this->fill = true;
		}
	}

	// Set href targets for CSIM
	function SetCSIMTargets($aTargets,$aAlts=null) {
		$this->csimtargets=$aTargets;
		$this->csimalts=$aAlts;
	}

	// Get all created areas
	function GetCSIMareas() {
		return $this->csimareas;
	}

	function Stroke($img, $pos, $scale, $startangle) {
		$nbrpnts = count($this->data);
		$astep=2*M_PI/$nbrpnts;
		$a=$startangle;

		for($i=0; $i<$nbrpnts; ++$i) {

			// Rotate each non null point to the correct axis-angle
			$cs=$scale->RelTranslate($this->data[$i]);
			$x=round($cs*cos($a)+$scale->scale_abs[0]);
			$y=round($pos-$cs*sin($a));

			$pnts[$i*2]=$x;
			$pnts[$i*2+1]=$y;

			// If the next point is null then we draw this polygon segment
			// to the center, skip the next and draw the next segment from
			// the center up to the point on the axis with the first non-null
			// value and continues from that point. Some additoinal logic is necessary
			// to handle the boundary conditions
			if( $i < $nbrpnts-1 ) {
				if( is_null($this->data[$i+1]) ) {
					$cs = 0;
					$x=round($cs*cos($a)+$scale->scale_abs[0]);
					$y=round($pos-$cs*sin($a));
					$pnts[$i*2]=$x;
					$pnts[$i*2+1]=$y;
					$a += $astep;
				}
			}

			$a += $astep;
		}

		if( $this->fill ) {
			$img->SetColor($this->fill_color);
			$img->FilledPolygon($pnts);
		}

		$img->SetLineWeight($this->weight);
		$img->SetColor($this->color);
		$img->SetLineStyle($this->linestyle);
		$pnts[] = $pnts[0];
		$pnts[] = $pnts[1];
		$img->Polygon($pnts);
		$img->SetLineStyle('solid'); // Reset line style to default

		// Add plotmarks on top
		if( $this->mark->show ) {
			for($i=0; $i < $nbrpnts; ++$i) {
				if( isset($this->csimtargets[$i]) ) {
					$this->mark->SetCSIMTarget($this->csimtargets[$i]);
					$this->mark->SetCSIMAlt($this->csimalts[$i]);
					$this->mark->SetCSIMAltVal($pnts[$i*2], $pnts[$i*2+1]);
					$this->mark->Stroke($img, $pnts[$i*2], $pnts[$i*2+1]);
					$this->csimareas .= $this->mark->GetCSIMAreas();
				}
				else {
					$this->mark->Stroke($img,$pnts[$i*2],$pnts[$i*2+1]);
				}
			}
		}

	}

	function GetCount() {
		return count($this->data);
	}

	function Legend($graph) {
		if( $this->legend == '' ) {
			return;
		}
		if( $this->fill ) {
			$graph->legend->Add($this->legend,$this->fill_color,$this->mark);
		} else {
			$graph->legend->Add($this->legend,$this->color,$this->mark);
		}
	}

} // Class

//===================================================
// CLASS RadarGraph
// Description: Main container for a radar graph
//===================================================
class RadarGraph extends Graph {
	public $grid,$axis=null;
	private $posx,$posy;
	private $len;
	private $axis_title=null;

	function __construct($width=300,$height=200,$cachedName="",$timeout=0,$inline=1) {
		parent::__construct($width,$height,$cachedName,$timeout,$inline);
		$this->posx = $width/2;
		$this->posy = $height/2;
		$this->len = min($width,$height)*0.35;
		$this->SetColor(array(255,255,255));
		$this->SetTickDensity(TICKD_NORMAL);
		$this->SetScale('lin');
		$this->SetGridDepth(DEPTH_FRONT);
	}

	function HideTickMarks($aFlag=true) {
		$this->axis->scale->ticks->SupressTickMarks($aFlag);
	}

	function ShowMinorTickmarks($aFlag=true) {
		$this->yscale->ticks->SupressMinorTickMarks(!$aFlag);
	}

	function SetScale($axtype,$ymin=1,$ymax=1,$dummy1=null,$dumy2=null) {
		if( $axtype != 'lin' && $axtype != 'log' ) {
			JpGraphError::RaiseL(18003,$axtype);
			//("Illegal scale for radarplot ($axtype). Must be \"lin\" or \"log\"");
		}
		if( $axtype == 'lin' ) {
			$this->yscale = new LinearScale($ymin,$ymax);
			$this->yscale->ticks = new RadarLinearTicks();
			$this->yscale->ticks->SupressMinorTickMarks();
		}
		elseif( $axtype == 'log' ) {
			$this->yscale = new LogScale($ymin,$ymax);
			$this->yscale->ticks = new RadarLogTicks();
		}

		$this->axis = new RadarAxis($this->img,$this->yscale);
		$this->grid = new RadarGrid();
	}

	function SetSize($aSize) {
		if( $aSize < 0.1 || $aSize>1 ) {
			JpGraphError::RaiseL(18004,$aSize);
			//("Radar Plot size must be between 0.1 and 1. (Your value=$s)");
		}
		$this->len=min($this->img->width,$this->img->height)*$aSize/2;
	}

	function SetPlotSize($aSize) {
		$this->SetSize($aSize);
	}

	function SetTickDensity($densy=TICKD_NORMAL,$dummy1=null) {
		$this->ytick_factor=25;
		switch( $densy ) {
			case TICKD_DENSE:
				$this->ytick_factor=12;
				break;
			case TICKD_NORMAL:
				$this->ytick_factor=25;
				break;
			case TICKD_SPARSE:
				$this->ytick_factor=40;
				break;
			case TICKD_VERYSPARSE:
				$this->ytick_factor=70;
				break;
			default:
				JpGraphError::RaiseL(18005,$densy);
				//("RadarPlot Unsupported Tick density: $densy");
		}
	}

	function SetPos($px,$py=0.5) {
		$this->SetCenter($px,$py);
	}

	function SetCenter($px,$py=0.5) {
		if( $px >= 0 && $px <= 1 ) {
			$this->posx = $this->img->width*$px;
		}
		else {
			$this->posx = $px;
		}
		if( $py >= 0 && $py <= 1 ) {
			$this->posy = $this->img->height*$py;
		}
		else {
			$this->posy = $py;
		}
	}

	function SetColor($aColor) {
		$this->SetMarginColor($aColor);
	}

	function SetTitles($aTitleArray) {
		$this->axis_title = $aTitleArray;
	}

	function Add($aPlot) {
		if( $aPlot == null ) {
			JpGraphError::RaiseL(25010);//("Graph::Add() You tried to add a null plot to the graph.");
		}
		if( is_array($aPlot) && count($aPlot) > 0 ) {
			$cl = $aPlot[0];
		}
		else {
			$cl = $aPlot;
		}

		if( $cl instanceof Text ) $this->AddText($aPlot);
		elseif( class_exists('IconPlot',false) && ($cl instanceof IconPlot) ) $this->AddIcon($aPlot);
		else {
			$this->plots[] = $aPlot;
		}
	}

	function GetPlotsYMinMax($aPlots) {
		$min=$aPlots[0]->Min();
		$max=$aPlots[0]->Max();
		foreach( $this->plots as $p ) {
			$max=max($max,$p->Max());
			$min=min($min,$p->Min());
		}
		if( $min < 0 ) {
			JpGraphError::RaiseL(18006,$min);
			//("Minimum data $min (Radar plots should only be used when all data points > 0)");
		}
		return array($min,$max);
	}

	function StrokeIcons() {
		if( $this->iIcons != null ) {
			$n = count($this->iIcons);
			for( $i=0; $i < $n; ++$i ) {
				$this->iIcons[$i]->Stroke($this->img);
			}
		}
	}

	function StrokeTexts() {
		if( $this->texts != null ) {
			$n = count($this->texts);
			for( $i=0; $i < $n; ++$i ) {
				$this->texts[$i]->Stroke($this->img);
			}
		}
	}

	// Stroke the Radar graph
	function Stroke($aStrokeFileName='') {

		// If the filename is the predefined value = '_csim_special_'
		// we assume that the call to stroke only needs to do enough
		// to correctly generate the CSIM maps.
		// We use this variable to skip things we don't strictly need
		// to do to generate the image map to improve performance
		// a best we can. Therefor you will see a lot of tests !$_csim in the
		// code below.
		$_csim = ( $aStrokeFileName === _CSIM_SPECIALFILE );

		// We need to know if we have stroked the plot in the
		// GetCSIMareas. Otherwise the CSIM hasn't been generated
		// and in the case of GetCSIM called before stroke to generate
		// CSIM without storing an image to disk GetCSIM must call Stroke.
		$this->iHasStroked = true;

		$n = count($this->plots);
		// Set Y-scale

		if( !$this->yscale->IsSpecified() && count($this->plots) > 0 ) {
			list($min,$max) = $this->GetPlotsYMinMax($this->plots);
			$this->yscale->AutoScale($this->img,0,$max,$this->len/$this->ytick_factor);
		}
		elseif( $this->yscale->IsSpecified() &&
		( $this->yscale->auto_ticks || !$this->yscale->ticks->IsSpecified()) ) {

			// The tick calculation will use the user suplied min/max values to determine
			// the ticks. If auto_ticks is false the exact user specifed min and max
			// values will be used for the scale.
			// If auto_ticks is true then the scale might be slightly adjusted
			// so that the min and max values falls on an even major step.
			$min = $this->yscale->scale[0];
			$max = $this->yscale->scale[1];
			$this->yscale->AutoScale($this->img,$min,$max,
			$this->len/$this->ytick_factor,
			$this->yscale->auto_ticks);
		}

		// Set start position end length of scale (in absolute pixels)
		$this->yscale->SetConstants($this->posx,$this->len);

		// We need as many axis as there are data points
		$nbrpnts=$this->plots[0]->GetCount();

		// If we have no titles just number the axis 1,2,3,...
		if( $this->axis_title==null ) {
			for($i=0; $i < $nbrpnts; ++$i ) {
				$this->axis_title[$i] = $i+1;
			}
		}
		elseif( count($this->axis_title) < $nbrpnts) {
			JpGraphError::RaiseL(18007);
			// ("Number of titles does not match number of points in plot.");
		}
		for( $i=0; $i < $n; ++$i ) {
			if( $nbrpnts != $this->plots[$i]->GetCount() ) {
				JpGraphError::RaiseL(18008);
				//("Each radar plot must have the same number of data points.");
			}
		}

		if( !$_csim ) {
			if( $this->background_image != '' ) {
				$this->StrokeFrameBackground();
			}
			else {
				$this->StrokeFrame();
				$this->StrokeBackgroundGrad();
			}
		}
		$astep=2*M_PI/$nbrpnts;

		if( !$_csim ) {
			if( $this->iIconDepth == DEPTH_BACK ) {
				$this->StrokeIcons();
			}


			// Prepare legends
			for($i=0; $i < $n; ++$i) {
				$this->plots[$i]->Legend($this);
			}
			$this->legend->Stroke($this->img);
			$this->footer->Stroke($this->img);
		}

		if( !$_csim ) {
			if( $this->grid_depth == DEPTH_BACK ) {
				// Draw axis and grid
				for( $i=0,$a=M_PI/2; $i < $nbrpnts; ++$i, $a += $astep ) {
					$this->axis->Stroke($this->posy,$a,$grid[$i],$this->axis_title[$i],$i==0);
				}
				$this->grid->Stroke($this->img,$grid);
			}
			if( $this->iIconDepth == DEPTH_BACK ) {
				$this->StrokeIcons();
			}

		}

		// Plot points
		$a=M_PI/2;
		for($i=0; $i < $n; ++$i ) {
			$this->plots[$i]->Stroke($this->img, $this->posy, $this->yscale, $a);
		}

		if( !$_csim ) {
			if( $this->grid_depth != DEPTH_BACK ) {
				// Draw axis and grid
				for( $i=0,$a=M_PI/2; $i < $nbrpnts; ++$i, $a += $astep ) {
					$this->axis->Stroke($this->posy,$a,$grid[$i],$this->axis_title[$i],$i==0);
				}
				$this->grid->Stroke($this->img,$grid);
			}

			$this->StrokeTitles();
			$this->StrokeTexts();
			if( $this->iIconDepth == DEPTH_FRONT ) {
				$this->StrokeIcons();
			}
		}

		// Should we do any final image transformation
		if( $this->iImgTrans && !$_csim ) {
			if( !class_exists('ImgTrans',false) ) {
				require_once('jpgraph_imgtrans.php');
			}

			$tform = new ImgTrans($this->img->img);
			$this->img->img = $tform->Skew3D($this->iImgTransHorizon,$this->iImgTransSkewDist,
			$this->iImgTransDirection,$this->iImgTransHighQ,
			$this->iImgTransMinSize,$this->iImgTransFillColor,
			$this->iImgTransBorder);
		}

		if( !$_csim ) {
			// If the filename is given as the special "__handle"
			// then the image handler is returned and the image is NOT
			// streamed back
			if( $aStrokeFileName == _IMG_HANDLER ) {
				return $this->img->img;
			}
			else {
				// Finally stream the generated picture
				$this->cache->PutAndStream($this->img,$this->cache_name,$this->inline,$aStrokeFileName);
			}
		}
	}
} // Class

/* EOF */
?>
